drucken bookmarks versenden konfigurieren admin pdf Sicherheit: Mehrere Probleme in Asterisk
Name: |
Mehrere Probleme in Asterisk |
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ID: |
200610-15 |
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Distribution: |
Gentoo |
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Plattformen: |
Keine Angabe |
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Datum: |
Di, 31. Oktober 2006, 12:38 |
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Referenzen: |
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-4345
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-4346
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-5444
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-5445 |
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Applikationen: |
Asterisk |
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Originalnachricht |
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- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Gentoo Linux Security Advisory GLSA 200610-15 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - http://security.gentoo.org/ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Severity: High Title: Asterisk: Multiple vulnerabilities Date: October 30, 2006 Bugs: #144941, #151881 ID: 200610-15
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Synopsis ========
Asterisk is vulnerable to the remote execution of arbitrary code or a Denial of Service.
Background ==========
Asterisk is an open source implementation of a telephone private branch exchange (PBX).
Affected packages =================
------------------------------------------------------------------- Package / Vulnerable / Unaffected ------------------------------------------------------------------- 1 net-misc/asterisk < 1.2.13 >= 1.2.13
Description ===========
Asterisk contains buffer overflows in channels/chan_mgcp.c from the MGCP driver and in channels/chan_skinny.c from the Skinny channel driver for Cisco SCCP phones. It also dangerously handles client-controlled variables to determine filenames in the Record() function. Finally, the SIP channel driver in channels/chan_sip.c could use more resources than necessary under unspecified circumstances.
Impact ======
A remote attacker could execute arbitrary code by sending a crafted audit endpoint (AUEP) response, by sending an overly large Skinny packet even before authentication, or by making use of format strings specifiers through the client-controlled variables. An attacker could also cause a Denial of Service by resource consumption through the SIP channel driver.
Workaround ==========
There is no known workaround for the format strings vulnerability at this time. You can comment the lines in /etc/asterisk/mgcp.conf, /etc/asterisk/skinny.conf and /etc/asterisk/sip.conf to deactivate the three vulnerable channel drivers. Please note that the MGCP channel driver is disabled by default.
Resolution ==========
All Asterisk users should upgrade to the latest version:
# emerge --sync # emerge --ask --oneshot --verbose ">=net-misc/asterisk-1.2.13"
References ==========
[ 1 ] CVE-2006-4345 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-4345 [ 2 ] CVE-2006-4346 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-4346 [ 3 ] CVE-2006-5444 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-5444 [ 4 ] CVE-2006-5445 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-5445
Availability ============
This GLSA and any updates to it are available for viewing at the Gentoo Security Website:
http://security.gentoo.org/glsa/glsa-200610-15.xml
Concerns? =========
Security is a primary focus of Gentoo Linux and ensuring the confidentiality and security of our users machines is of utmost importance to us. Any security concerns should be addressed to security@gentoo.org or alternatively, you may file a bug at http://bugs.gentoo.org.
License =======
Copyright 2006 Gentoo Foundation, Inc; referenced text belongs to its owner(s).
The contents of this document are licensed under the Creative Commons - Attribution / Share Alike license.
http://creativecommons.org/licenses/by-sa/2.5
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